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why feel temperature on feaver?
Fever is an important part of the body's defense against infection. Most bacteria and viruses that cause infections in people thrive best at 98.6 °F.
Fevers are caused by chemicals called pyrogens flowing in the bloodstream. Pyrogens make their way to the hypothalamus in the brain, which is in charge of regulating body temperature. When pyrogens bind to certain receptors in the hypothalamus, body temperature rises.One common pyrogen is called Interleukin-1 (IL-1). IL-1 is produced by white blood cells called macrophages when they come into contact with certain bacteria and viruses.


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